Fix a bug about TOTP refresh

pass/Controllers/PasswordDetailTableViewController.swift

@@ -170,20 +170,16 @@ class PasswordDetailTableViewController: UITableViewController, UIGestureRecogni
                     return
             }
             switch token.generator.factor {
-            case .counter:
+            case .timer:
-                // htop
-                break
-            case .timer(let period):
                 // totp
-                let timeSinceEpoch = Date().timeIntervalSince1970
+                if let (title, otp) = strongSelf.password?.getOtpStrings() {
-                let validTime = Int(period - timeSinceEpoch.truncatingRemainder(dividingBy: period))
+                    strongSelf.tableData[indexPath.section].item[indexPath.row].title = title
-                strongSelf.tableData[indexPath.section].item[indexPath.row].title = "time-based (expiring in \(validTime)s)"
-                cell.cellData?.title = "time-based (valid within \(validTime)s)"
-                if validTime <= 1 || validTime >= Int(period - 1) {
-                    let otp = token.currentPassword ?? "error"
                     strongSelf.tableData[indexPath.section].item[indexPath.row].content = otp
+                    cell.cellData?.title = title
                     cell.cellData?.content = otp
                 }
+            default:
+                break
             }
         }
     }

pass/Models/Password.swift

@@ -239,4 +239,24 @@ class Password {
         }
         self.updatePassword(name: self.name, plainText: lines.joined(separator: "\n"))
     }
+    
+    // return the description and the password strings
+    func getOtpStrings() -> (description: String, otp: String)? {
+        guard let token = self.otpToken else {
+            return nil
+        }
+        var description : String
+        switch token.generator.factor {
+        case .counter:
+            // htop
+            description = "HMAC-based"
+        case .timer(let period):
+            // totp
+            let timeSinceEpoch = Date().timeIntervalSince1970
+            let validTime = Int(period - timeSinceEpoch.truncatingRemainder(dividingBy: period))
+            description = "time-based (expiring in \(validTime)s)"
+        }
+        let otp = self.otpToken?.currentPassword ?? "error"
+        return (description, otp)
+    }
 }